Fractal characteristics of surface roughness and their effects on laser shock waves

The Weierstrass–Mandelbrot function model was used to simulate the rough topography of a target surface, and fractal theory study characteristics surface topography, which is self-similarity topography. 3D fluid dynamics governing equations laser-supported detonation plasma flow field in Cartesian coordinates are given discretized by high-order difference scheme. equation state under different conditions considered, new method flux splitting introduced carry out numerical simulations. results pressure, density, temperature, velocity at times roughnesses obtained, show evolvement ablative plasma. simulated that can obviously affect propagation wave near wall. In addition, waveform also destroyed, forming broken waveform.